Guys like Shields aren't just replaced. Just like all pro's drafted like Nick Collins aren't just replaced. I don't know how good that guy from Houston or the Bills were, I don't watch them that often. I do know they played behind a lot more pressure from up front. i also know that guys that are worth it, usually aren't let go until they aren't worth it, or they are vastly over paid. Nothing about the DB's this FA excited me and besides Perry, who we signed, there wasn't a pass rusher worth investing much in either.
You act like losing a guy like Finley, just replace him. Nick Collins, just go get someone, Shields, should have had someone available in October on speed dial Ted. Never mind the roster turnover and the 10,000 other variables in any given year.